在计算机程序设计中指执行一次调用。 In computer programming, to execute a call.
用于修饰或说明一种进程或过程，它允许用户调用它，而用户并不用知道它的存在。 Pertaining to a process, or procedure, invoked by a user without the latter being aware of its existence.
在计算机安全学中，一种计算机程序，表面上或实际上有某种有用的功能，而含有附加的（隐藏的）可能利用了调用进程的合法特许来危害系统安全的功能。 In computer security, a computer program with an apparently or actually useful function that contains additional(hidden) functions that surreptitiously exploit the legitimate authorizations of the invoking process to the detriment of security.
